DE10107153B4 - Flat escape sign luminaire with a substantially square display window - Google Patents

Abstract

Flat escape route light with a substantially quadrangular display screen and lateral Light entry exit edges and a variety of light-emitting Diodes (LED), which are arranged in a U-shaped reflector body are, wherein the reflector body with its legs at least one light entry edge at least partially engages, wherein in the reflector body, a support plate for receiving at least one white light LED line is located, and on the reflector body, starting from the U-shaped legs integral holding extensions for fixing to the display screen, characterized in that that the Support plate and / or the white light LED line at a predetermined angle to the longitudinal side of the light entry edge the display screen is oriented, and the angle in the range of 15 ° to 35 °, preferably 20 ° to 25 °, continue the reflector body a bending stamped part is, wherein the holding extensions in pairs opposite each other are arranged in the corner regions and include a mounting recess and the mounting recess as a slot for attaching the reflector body on the light entry edge of the display and there provided Fixing bolts or screws is formed.

Description

The The invention relates to a planar Escape sign luminaire with a substantially quadrangular display screen and side light entry edges and a plurality of light emitting diodes (LED) disposed in a U-shaped reflector body are, wherein the reflector body with its legs at least one light entry edge at least partially encompasses, according to the preamble of Patent claim 1.

From the DE 197 47 096 A1 is a flat lamp with a compact lens assembly and lateral light entry edges, in which the light of a plurality of light emitting diodes is fed, previously known. Such devices serve to illuminate or backlight pictograms, in particular safety signs.

According to the solution after DE 197 47 096 A1 At least between the light entry edges for feeding and the space provided for the light emission surface, an edge zone is formed, in which the light is essentially conducted, but not radiated into the outer space. The edge zone should be dimensioned so that in their area the injected light can mix sufficiently to cause a sufficiently uniform light emission on the light-emitting surface. In one embodiment, the light-emitting diodes are arranged in the irradiation region of two mutually opposite light-entry edges. Furthermore, it is provided to arrange the light emitting diodes obliquely to the light entry edge and to feed the radiation via deflection optics in the light entry edges. The LEDs after DE 197 47 096 A1 are embedded in a channel-shaped reflector, which has a width which is substantially equal to the thickness of the light disk assembly.

at Such a escape sign light is indeed a relatively uniform lighting the safety sign possible, however, the escape route itself is due to lack of space radiated light energy not or not sufficiently illuminated.

In order to achieve with such a escape sign lamp and a walkway lighting was, according to DE 197 47 079 A1 proposed to provide a sufficient number of light-emitting diodes whose light emission is oriented directly to the illuminated path. It is therefore not the light of the other LED is fed into the light guide, but directed directly or in the light distribution over a light bundling optics on the rescue route that leads to the light. In such a solution, however, there are problems attaching the escape sign lamp itself, especially when the lamp is suspended or mounted on a boom on the wall.

To the State of the art belong continue escape sign lights, which supplies from two power sources be in one mode, a fluorescent lamp and in another mode, a plurality of light-emitting Diodes are used. In this way, the lighting requirements both in a bright environment and in a dark environment become.

A duplicity the required power supply for the different bulbs leads however to a higher one Effort and associated costs, but what to avoid applies.

From the German utility model DE 297 02 779 U1 is a flat escape sign light previously known, which has a substantially rectangular or rectangular display screen.

There is a carrier element provided on which a plurality of light-emitting diodes is mounted. The support element can be as strip-shaped Board be formed, wherein the carrier element itself to the outside a housing is covered. The beam direction of the local light-emitting Diodes runs substantially perpendicular to the narrow top of the subject Lamp. The local housing configuration with obvious positive locking the lower ends of the housing profile on a lens assembly is not suitable, simultaneously add more fasteners or the indirect or direct attachment of the luminaire, e.g. on a wall, to serve.

The DE 199 06 129 A1 , Which relates to a display device specific light guide, discloses a light coupling surface, which is not arranged on an end face, but on a broad side. For this purpose, the light of a light source radiates at an acute angle to the main extension of the light guide into the light coupling surface, so that no or only slight light conduction losses occur.

From the foregoing, it is therefore an object of the invention to provide a further developed flat escape sign light with a substantially square display screen and side light entrance or light exit edges and a plurality of light-emitting diodes, which ensures sufficient illumination of the actual escape sign both sufficient and sufficient under all operating circumstances Light in the environment, ie radiates on the emergency route. The create The escape sign luminaire should also be suitable for a variety of mounting and mounting types.

The solution The object of the invention is achieved with a rescue sign lamp according to the characteristics of the patent claim 1, wherein the dependent claims expedient refinements and developments include.

First, will assuming use of a preconfigured white light LED line, wherein this line comprises a strip of printed circuit board which serves both as a wiring carrier for the light emitting diodes as well as more active and / or passive Components for current limiting or current control is used. Preferably the light distribution characteristic of the LEDs is ellipsoidal with a Angular distribution of e.g. 60 ° / 120 °, whereby the lighting efficiency is further improved.

in the preferably metallic reflector body is a support plate for Recording the at least one white light LED line located, wherein the support plate and / or the white light LED line below a predetermined Angle to the longitudinal axis the light entry edge of the display window is tilted or are.

Farther owns the reflector body starting from the U-shaped thighs integral holding extensions for attaching to the display screen or bolts provided there.

In a preferred embodiment The invention are at two opposite Light entry edges each have a reflector body, each with at least one White light LED row arranged, wherein the angular position of the rows is mirror symmetric or opposite directed elected is.

By the type of angular coupling of radiation results in a particularly uniform lighting on the front of the display screen arranged pictogram sheet or an imprint there and it is ensured at the same time, that enough stray light over the remaining free light exit edges to the desired Way lighting can be radiated.

Of the Coupling angle is preferred as an acute angle in the range between 15 ° and 35 ° selected. at a preferred embodiment is the Angle substantially 25 °.

The Support plate for receiving the white light LED line can be designed as a plastic profile and an adhesive strip for fixing the circuit board, so that the assembly within the U-shaped reflector body very easily and at low cost is possible.

Of the reflector body can be designed as a bending stamped part, wherein the holding extensions in pairs opposite are arranged in the corner regions and have a mounting recess.

The Befestigungsausnehmung can as a slot for attaching the reflector body on the Light entry edge of the display screen and provided there fastening bolts be designed.

The Fixing bolts can when wall-mounted the escape sign light as a spacer to a Serve mounting plate, wherein directed to the mounting wall Side of the mounting plate, a power supply is provided for operation.

at the mounting of the lamp by means of wall bracket is on one side the edge of a holding profile provided which the required Power supply and necessary means for electrical connection and for includes mechanical fastening. At the opposite Side there is the possibility of the covering the free edge of the display screen with a reflective foil, to prevent the escape of lateral scattered light and the Light that is emitted indirectly to the street lighting, too increase.

at suspended Mounting are each on the side edges of the display screen support profiles with Profilendstücken provided, wherein at the upper end of the support profiles each have a mounting plate is arranged.

A similar Construction will be for chosen the corner mounting of the lamp. Again, each of the side edges carrying profiles are provided with Profilendstücken wherein the support profiles at the upper end connected to a holding profile are. The holding profile, which preferably has a U-shape, decreases the power supply for power supply and electrical connection means on.

In the case, that at a suspended embodiment the escape sign light on both sides of the display window Rescue signs or pictograms are provided, proves the opposite directed oblique Arranging the white light LED lines as special advantageous. For example, the at the upper light entrance edge provided line of illumination of a pictogram on the front the display disc and one at the bottom edge of the display light provided further white light LED line the lighting of a pictogram, which at the back the display screen is arranged serve.

Prefers the inclination takes place the white light LED lines such that virtually the back of the Escape sign or pictogram is irradiated, whereby by reflection and due to given scattering of the light within the transparent one Display screen, the way lighting is guaranteed.

The Mounting plate for wall mounting the lamp can on its front reflective or with a bright color coating be provided to the visibility and contrast of the escape sign to improve, but at the same time as a scattered area to To serve route lighting. Here it is within the meaning of the invention, if a first white light LED line with its angular inclination the escape sign, located on the front of the display screen is illuminated from behind and another white light LED row, e.g. attached to the lower edge of the escape sign light, so inclined is that about the Display panel, the front of the mounting plate is illuminated.

any photoconductive means for coupling the radiation of the light-emitting Diodes in the preferred of a plastic material (PMMA) existing Display screen are not required.

The Invention will be described below with reference to exemplary embodiments and under With the help of figures closer explained become.

in this connection demonstrate:

1 a front view of a wall-mounted escape sign luminaire;

2 a plan view of the wall-mounted escape sign light;

3 a sectional view taken along the line DD according to 1 ;

4 a detailed representation according to G after 3 ;

5 a front view of a escape sign light attached to a wall bracket;

6 Sectional detail displays along the lines NN and MM after 5 ;

7 a escape sign light in suspended embodiment;

8th Sectional detail of the light after 7 along the lines BB and CC;

9 a escape sign luminaire for ceiling mounting in front view;

10 a sectional view of the escape sign after 9 along the line AA; and

11 Section details B and C according to 10 ,

The escape sign lights according to the embodiment comprise a display screen 1 eg made of PMMA plastic in a transparent design. On the front and / or back then pictograms or escape signs (not shown) are arranged.

In the embodiment of the escape sign lamp, suitable for wall mounting to the 1 to 4 , is at the upper light entry edge of the display screen 1 a reflector body 2 attached. Its attachment via retaining extensions 3 , each having slots so that sliding in the area of the fastening bolts 4 is possible.

The fastening bolts 4 go into a spacer 5 over and are with a mounting plate 6 screwed. On the back of the mounting plate 6 is a power supply 7 located, via a cable 8th with the inside of the reflector body 2 located white light LEDs is connected.

As in the 3 and 4 is clearly visible inside the reflector body 2 a support plate 9 which in turn is a strip of printed circuit board 10 receives, which serves as a wiring support for the white light LEDs. On the circuit board more active and / or passive construction elements in SMD technology can be located to ensure safe operation of the LEDs.

The support plate 9 and thus also the PCB strip 10 is at an angle to the longitudinal axis of the light entry edge 12 the display screen 1 oriented. In the example shown, the angle is 25 °.

The left and right edges of the display screen 1 are with a reflector strip 13 Covered, for example, an aluminum foil, so that street lighting stray light only on the lower now light exit edge of the display screen 1 exit.

In the embodiments of an inclination of the circuit board strip 10 with the white light LEDs 11 assumed, with an acute angle is selected. According to another, not graphically illustrated embodiment, however, the angle can also be given much smaller up to a zero angle.

The mounting plate 6 is at least on the front with a bright color coating or a reflective surface provided to ensure a sufficient good contrast between the escape sign and the environment and on the other hand radiate stray light to optimize the directional lighting.

The housing 14 which is the power adapter 7 also includes the electrical connection means in the form of a terminal strip, for example 15 and has characteristics 16 with holes for mounting the lamp to a wall.

In the embodiment of the escape sign lamp with wall bracket after the 5 and 6 are both an upper and a lower reflector body 2 , each PCB strips 10 with white light LEDs comprising provided. In this example, the skew takes place as in the 6 becomes clear, directed opposite, with an upper reflector body 2 with PCB strips 10 and white light LEDs 11 to the front of the display screen 1 and a lower reflector body 2 with PCB strips 10 and white light LEDs 11 to the back of the display screen 1 is oriented.

at Such wall bracket escape sign light are usually applied to both the front and the rear escape sign, which by the chosen Type of beam or coupling angle optimally and uniformly illuminated can be.

On one side edge of the display screen 1 is a holding profile 17 eg fastened by screwing, which in turn comprises means for fixing the lamp to the wall.

The holding profile 17 may have the power supply with the necessary electrical connection means (not shown).

In the case of a suspended mounting of the escape sign lamp according to the embodiment of the 7 and 8th are each at the side edges carrying profiles 18 with profile end pieces 19 present, being at the top of the support profiles 18 one mounting plate each 20 is provided. The mounting plates 20 can with a known canopy 21 be covered.

Analogous to the 6 explained are the white light LEDs 11 on the PCB strip 10 obliquely einstrahlend, namely directed opposite to the respective longitudinal side of the light entry edges 12 arranged.

For mechanically fixing the PCB strips 10 can in a particularly simple manner a double-sided adhesive strip 22 Find use.

The 9 to 11 serve the description of an embodiment of the escape sign light, suitable for ceiling mounting, here also as in the suspended embodiment on the side edges support profiles 18 are located. The carrying profiles 18 , which also cap-like profile end pieces 19 have, are at their top and their upper end with a holding profile 23 connected inside which receives the power supply for the white light LEDs and electrical connection means. In this embodiment, as in FIG 10 shown in section, the angular position of the white light LED row are selected mirror-symmetrically or as in the 11 recognizable, an oppositely directed orientation is realized by the reflector body 2 with the holding processes 3 from the fastening bolt 4 loosened and turned back through 180 °.

It can therefore start from essentially standardized sizes of the display screen 1 to work with standardized reflector bodies, which include corresponding means for power supply and electrical connection for the white light LED line.

In the described embodiments, each was a single line in the reflector body 2 but it is alternatively possible to provide two substantially parallel rows.

Everything in all it succeeds with the invention described, a flat escape sign with Display screen and a variety of light-emitting diodes specify in a particularly simple manner not only a sufficient Illumination of the actual escape sign, but also of the Rescue route ensures without that creative possibilities otherwise required additional bulbs as in the state the technology restricted become.

1

display screen

2

reflector body

3

Holding projection

4

mounting bolts

5

spacer

6

mounting plate

7

power adapter

8th

electric wire

9

support plate

10

PCB strips

11

White LED

12

Light entry edge

13

reflector strips

14

casing

15

terminal block

16

manifestations

17

retaining profile

18

T-bars

19

Profilendstück

20

mounting plate

21

canopy

22

tape

23

Retaining profile-ceiling mounting

Claims (9)

Flat escape route luminaire with a substantially quadrangular display screen and lateral light entry exit edges and a plurality of light-emitting diodes (LED), which are arranged in a U-shaped reflector body, wherein the reflector body at least partially surrounds at least one light entry edge with its legs, wherein in the reflector body Support plate for receiving at least one white light LED line is befindlich, and on the reflector body, starting from the U-shaped legs integral holding extensions for fixing to the display disc are befindlicher, characterized in that the support plate and / or the white light LED line under a is predetermined angle to the longitudinal side of the light entry edge of the display panel is oriented, and the angle is in the range of 15 ° to 35 °, preferably 20 ° to 25 °, further, the reflector body is a bending stamped part, wherein the holding extensions in pairs opposite each other d are arranged in the corner regions and comprise a mounting recess and the mounting recess is formed as an elongated hole for attaching the reflector body to the light entry edge of the display screen and provided there fastening bolts or screws. extensive Escape lamp according to claim 1, characterized that on two opposite Light entry edges each have a reflector body, each with at least one White-light LED line is arranged, wherein the angular position of the LED rows mirror-symmetrical or oppositely aligned with each other. extensive Escape lamp according to claim 1, characterized that the Support plate is designed as a plastic profile and an adhesive strip for fixing the white light LED line having. extensive Escape lamp according to claim 1, characterized that the Mounting bolts for wall mounting the lamp as a spacer to a Mounting plate are formed, wherein at the attachment wall directed side of the mounting plate, a power supply to operate the at least a white light LED line is provided. extensive Escape lamp according to one of claims 1 to 3, characterized that at Mounting the luminaire by means of a wall bracket on one side edge Holding profile is provided, which is a power supply for operating the at least one white light LED line and means for electrical connection. extensive Escape lamp according to one of claims 1 to 3, characterized that at suspended Installation of the luminaire on the side edges. Carrying profiles with Profilendstücken are provided, wherein at the upper end of the support profiles depending on a mounting plate is arranged. extensive Escape lamp according to one of claims 1 to 3, characterized that at Ceiling attachment of the luminaire at the side edges. Carrying profiles with profile end pieces are provided, wherein the support profiles at the top with a Holding profile are connected and the holding profile a power supply to Operate the at least one white light LED line as well as electrical connection means receives. extensive Escape lamp according to claim 4 or 5, characterized that the or the lateral light exit edges of the display screen with a reflective coating are provided. extensive Escape lamp according to one of the preceding claims, characterized characterized in that used LEDs an ellipsoidal light distribution characteristic exhibit.